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TPS25940A Datasheet Preview

TPS25940A Datasheet

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TPS25940A, TPS25940L
SLVSCF3A – JUNE 2014 – REVISED MARCH 2015
TPS25940x 2.7 – 18V eFuse with True Reverse Blocking and DevSleep Support for SSDs
1 Features
1 2.7 V – 18 V Operating Voltage, 20 V (Max)
• 42 mΩ RON (Typical)
• 0.6 A to 5.3 A Adjustable Current Limit (±8%)
• IMON Current Indicator Output (±8%)
• 200 μA Operating IQ (Typical)
• 95 μA DevSleep Mode IQ (Typical)
• 15 μA Disabled IQ (Typical)
• ±2% Overvoltage, Undervoltage Threshold
• Reverse Current Blocking
• 1 μs Reverse Voltage Shutoff
• Programmable dVo/dt Control
• Power Good and Fault Outputs
• -40°C to 125°C Junction Temperature Range
• UL 2367 Recognized
– File No. 169910
– RILIM 20 kΩ (4.81 A max)
• UL60950 - Safe during Single Point Failure Test
– Open/Short ILIM detection
2 Applications
• PCIe/SATA/SAS HDD and SSD Drives
• Enterprise and Micro Servers
• Smart Load Switch
• Set-Top-Box (STB), DTVs and Game Consoles
• RAID Cards - Holdup Power Management
• Telecom Switches and Routers
• Adapter Powered Devices
3 Description
The TPS25940 eFuse Power Switch is a compact,
feature rich power management device with a full
suite of protection functions, including a low power
DevSleep™ mode that supports compliance with the
SATA™ Device Sleep standard. The wide operating
range allows control of many popular DC bus
voltages. Integrated back to back FETs provide
bidirectional current control making the device well
suited for systems with load side holdup energy that
must not drain back to a failed supply bus.
Load, source and device protection are provided with
many programmable features including overcurrent,
dVo/dt ramp and overvoltage, undervoltage
thresholds. For system status monitoring and
downstream load control, the device provides
PGOOD, FLT and precise current monitor output.
Precise programmable undervoltage, overvoltage
thresholds and the low IQ DevSleep mode simplify
SSD power management design.
The TPS25940 monitors V(IN) and V(OUT) to provide
true reverse current blocking when V(IN) < (V(OUT) - 10
mV). This function supports swift changeover to a
boosted voltage energy storage element in systems
where backup voltage is greater than bus voltage.
Device Information(1)
PART NUMBER(2)
PACKAGE
BODY SIZE (NOM)
TPS25940A
TPS25940L
WQFN (20)
3.00 mm x 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
(2) TPS25940L = Latched, TPS25940A = Auto Retry
4 Simplified Schematic
2.7 to 18 V
V(IN)
IN
RTOTAL =
EN/UVLO 42 m:
OUT
FLT
OVP
PGOOD
DEVSLP
PGTH
dVdT
IMON
GND
ILIM
TPS25940x
To Load
Power Fail Detection and Blocking
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.




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TPS25940A Datasheet Preview

TPS25940A Datasheet

eFuse

No Preview Available !

TPS25940A, TPS25940L
SLVSCF3A – JUNE 2014 – REVISED MARCH 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Simplified Schematic............................................. 1
5 Revision History..................................................... 2
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ...................................... 4
7.2 ESD Ratings.............................................................. 4
7.3 Recommended Operating Conditions....................... 4
7.4 Thermal Characteristics ............................................ 4
7.5 Electrical Characteristics........................................... 5
7.6 Timing Requirements ................................................ 7
7.7 Typical Characteristics .............................................. 8
8 Parametric Measurement Information ............... 15
9 Detailed Description ............................................ 16
9.1 Overview ................................................................. 16
9.2 Functional Block Diagram ....................................... 17
9.3 Feature Description................................................. 18
9.4 Device Functional Modes........................................ 22
10 Application and Implementation........................ 24
10.1 Application Information.......................................... 24
10.2 Typical Application ................................................ 24
10.3 System Examples ................................................. 32
11 Power Supply Recommendations ..................... 35
11.1 Transient Protection .............................................. 35
11.2 Output Short-Circuit Measurements ..................... 36
12 Layout................................................................... 37
12.1 Layout Guidelines ................................................. 37
12.2 Layout Example .................................................... 38
13 Device and Documentation Support ................. 39
13.1 Related Links ........................................................ 39
13.2 Trademarks ........................................................... 39
13.3 Electrostatic Discharge Caution ............................ 39
13.4 Glossary ................................................................ 39
14 Mechanical, Packaging, and Orderable
Information ........................................................... 39
5 Revision History
Changes from Original (June 2014) to Revision A
Page
• Changed Features From: UL2367 Recognition Pending To: UL 2367 Recognized, RILIM 20 kΩ (4.81 A max), File
No. 169910 ............................................................................................................................................................................. 1
• Moved the Storage Temperature From the Handling Ratings table To Absolute Maximum Ratings table .......................... 4
• Changed the Handling Ratings table To: ESD Ratings table ................................................................................................ 4
• Added Test Condition to I(LIM): "R(ILIM) = 20 kΩ" in the Electrical Characteristics .................................................................. 5
• Changed Figure 24............................................................................................................................................................... 10
• Added condition R(ILIM) = 17.8 kΩ to Figure 40 and Figure 41 ............................................................................................ 13
• Changed Figure 43 .............................................................................................................................................................. 17
• Changed Equation 6 to include I(IMON_OS).............................................................................................................................. 21
• Added the NOTE to Application and Implementation .......................................................................................................... 24
• Added Note to Figure 57 ..................................................................................................................................................... 28
• Changed Equation 35 From: V(IN) x I(LOAD) To: V(IN) + I(LOAD)................................................................................................. 35
2
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Copyright © 2014–2015, Texas Instruments Incorporated
Product Folder Links: TPS25940A TPS25940L


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